Corrosion fatigue phenomena learned from failure analysis

The purpose of this paper is to present corrosion fatigue phenomena learned from failure analysis. The emphasis is focused upon the importance of the role of corrosion pit in the corrosion fatigue crack initiation process and intergranular fracture surface in the corrosion fatigue crack propagation process of steam turbine blade. The hydrogen effect is also stressed in the crack propagation process in the corrosion fatigue crack propagation of the cargo oil tank ship structural members for very large crude oil carrier. Finally the future problems should be solved in corrosion fatigue failure are touched in brief.